Self-acting adjustable feed-gear for



MORRILL & BALDWIN.

Metal Boring Machine.

No. 7,604. Patented-Aug. 27, 1850.

UNTED STATES FATENT UFFCE.

A. R. MORRILL AND H. BALDWIN, OF NASHVILLE, NEW HAMPSHIRE.

SELF-ACTING- ADJUSTABLE FEED-GEAR FOR DRILLINGr-MACHINES.

Specification of Letters Patent No. 7,604, dated August 2'?, 1850.

To aZZ whom t may concern Be it known that we, ALBEN R. MORRILL andHIRAM BALDWIN, of Nashville, in the. county of Hillsboro and State ofNew Hampshire, have invented a new and useful improvement in the feedmotion of machines for boring out steam-engine cylinders withoutdetaching them from their place in the engine, particularly thecylinders of locomotive engines, and also applicable to drilling Y andboring of all kinds, of which the following is an exact description,taken in connection with the annexed drawings, forming part of thisspecification.

Figure 1 is a side elevation of the machine showing it attached to thecylinder, with a part of the cylinder broken away to show the cuttersinside. Fig. 2 is an elevation of the end A, Fig. 1. Fig. 3 is a sectionon the line B, C, Fig. 1 looking toward A. Fig. 4L is a section on theline E, F, looking toward the cylinder. Fig. 5 is a section on the lineG, H, looking toward I, and showing the cutters.

The part marked a, in Figs. 1, 4 and 5 is a steam engine cylinder, whichmay be in its place in the engine, with its heads re moved to allow theshaft Z), to pass through it. c, c, Figs. 1, and 5 are cutter carriersmade fast to the shaft Z).

f, f, are cutters and are adjusted t0 cut the required depth by thescrews g.

ZL, h, are hangers bolted to the cylinder, by the bolts z', and carrythe boxes j, j, and the shaft Z9. The boxes y', j, are the bearings forthe shaft Zn, and are smaller than the sockets in the hangers L, 71.,which receive them to allow of their being adjusted to the center of thecylinder c, by the screws la. Z, Figs. 1, 2 and 3 is a hub andprojecting arm, and is fast to the shaft Z). m, is a pin and has its'bearing in the arm Z. n, Figs. 1, 2 and 3 is a catch or dog, fast tothe pin m. 0, Figs. l and 3 is a small arm fast to the pin m. p, is aspring and acts against the arm 0, and thereby keeps` the catch or dogn, pressed against the wheel r. s, is a milled wheel fast to the pin m,by which the pin may be turned with the fingers and the catch or dog nraised from the wheel r, at pleasure, and held away by the bow in thespring p, sink ing into the hollow in the end of the arm 0. u, is themain pulley for driving the shaft Z), to which it is secured by a fastspline sliding in the groove o, of the shaft.

fw, is a stand made fast to the floor of the shop or any otherconvenient place, and holds fast the screw both from revolving or movingin the direction of its length. y, Figs. 1, 2 and 3 is a toothed wheelwith a screw cut in its hub and screws on to the screw The wheel r, ismade a little larger than the wheel y, and is attached to the screw bymeans of a fast spline sliding in the groove .2. The screw 0a, afterscrewing through the wheel y, and sliding through the wheel r, slidesinto the shaft Z), which is made hollow to receive it.

Between cZ, and e, the circumference of the wheel r, is cut down to thedepth of the teeth of the wheel y, to allow the catch or dog n, to dropor be pressed down at cZ, between the teeth of the wheel y, and causethat wheel to revolve until the catch reaches e, when the catch israised by sliding upl the inclined plane at e, represented by thedot-ted line in Fig. 2; the remainder of the wheel 1", being larger'than the wheel y, the catchis held away from the teeth of the wheel y,till it again arrives at cZ,'and is then pressed down as before.l Thewheel y, being thus turned on the screw 00, it is moved a little towardthe cylinder, and pressing against the'wheel. 1", and that against theshaft Z), the shaft with the cutters f, f, is moved into the cylindersufficient for the cutting of the next revolution. g, is a thin segmentwhose circumference coincides with that of the wheel r, to which it isattached by two screws passing through a slot parallel to itscircumference as represented in'Fig. 3. By slipping this segment uponthe screws it may be so adjusted as to receive and lift out the catch n,at any desirable intermediate point between (Z, and e, Figs. 2 and 3.Thus if the space from LZ, to e, gives too much feed to the cut-ters, itmay by this arrangement be diminished to any desirable extent.

What we claim as our invention and desire to secure by Letters Patentis- The combination substantially as dcscribed, of the splined screw thesplined shaft b, the smooth wheel 1, the toothed wheel y, carrying a nutthe arm Z, the catch a, the small arm o, the spring p, and the segmentg, so as to form a self acting adjustable feed for boring or drillingmachines.

ALDEN R. MORRILL. HIRAM BALDWIN. Signed in presence of- GEO. STARK, WM.P. AINswoR'rH.

